May 2025 in “International Journal of Trichology” This study found that partially bald scalps of Indian men with androgenic alopecia retain progenitor cells marked by CD34 and Sox9, but these cells are absent in completely bald areas, suggesting that interventions might be more effective if focused on early-stage hair loss.
September 2023 in “bioRxiv (Cold Spring Harbor Laboratory)” This study observed that while some progenitor cells were present in the partially bald areas of androgenic alopecia in Indian men, the completely bald areas lacked these cells, suggesting potential timing for therapeutic intervention targeting hair follicle stem cell activity.
July 2025 in “Journal of Cosmetic and Laser Therapy” This case study reported rare alopecia resulting from a hyaluronic acid filler injection, noting approximately 80% hair regrowth after treatment with topical minoxidil.
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September 2013 in “PubMed” This case report suggests that methotrexate therapy for psoriasis may lead to hair regrowth in androgenetic alopecia, potentially due to its effects on testosterone metabolism.
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January 1999 in “Dermatology” This study found that cyclosporine A may lead to partial hair regrowth in 50% of patients with severe alopecia areata who do not respond to standard treatments.